1.(well-known)熟悉的；面熟的；耳熟的
'Well, hello y'all,' said a familiar voice.“嗨, 大家好。”一个耳熟的声音说。
I'm at home, in familiar surroundings with friends and family.我在家, 环境熟悉, 又和朋友及家人在一起。
2.to be familiar with sth
(be acquainted with)熟悉某事物；了解某事物；通晓某事物
I'm familiar with his work.我很了解他的工作。
He was not very familiar with the area.他不太熟悉这个地区。
3.(informal)友好的；不拘礼节的；随意的
His tone is familiar and bantering; he is frank about himself.他语气友好、逗趣, 谈起自己也挺坦率。
4.<贬>(overfriendly)过分亲昵的；过于随便的；放肆的
I can't stand that familiar tone he uses when he talks to young women.我受不了他和年轻女人说话时那种太随便的语气。
The driver of that taxi-cab seemed to me familiar to the point of impertinence.我觉得那个出租车司机太过随便, 简直到了失礼的地步。
5.(frequent)惯常的；常见的
6.to be on familiar terms with sb
(be friendly with)与某人友好；与某人交情很好
He certainly seemed on familiar terms with everyone there.他看起来确实好像和那里的每个人都很合得来。